[PATCH v25 21/44] sg: printk change %p to %pK

[Douglas Gilbert <dgilbert@interlog.com>]

This driver does a lot of buffer juggling in an attempt to
take some of that chore away from its users. When debugging
problems associated with that buffer juggling getting
sensible pointer values is a major aid. So change %p
to %pK. The system administrator can choose to obfuscate
%pK pointers. The "pK" is also easier to search for in the
code if further changes are required.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
---
 drivers/scsi/sg.c | 27 ++++++++++++++-------------
 1 file changed, 14 insertions(+), 13 deletions(-)

diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 94a07c8c7dd7..d9688bb8f864 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -864,6 +864,7 @@ sg_receive_v3(struct sg_fd *sfp, struct sg_request *srp, size_t count,
 		err = -EINVAL;
 		goto err_out;
 	}
+	SG_LOG(3, sfp, "%s: srp=0x%pK\n", __func__, srp);
 	err = sg_rec_state_v3(sfp, srp);
 	if (err < 0)
 		goto err_out;
@@ -1619,7 +1620,7 @@ sg_mmap(struct file *filp, struct vm_area_struct *vma)
 		return -ENXIO;
 	}
 	req_sz = vma->vm_end - vma->vm_start;
-	SG_LOG(3, sfp, "%s: vm_start=%p, len=%d\n", __func__,
+	SG_LOG(3, sfp, "%s: vm_start=%pK, len=%d\n", __func__,
 	       (void *)vma->vm_start, (int)req_sz);
 	if (vma->vm_pgoff)
 		return -EINVAL; /* only an offset of 0 accepted */
@@ -1667,7 +1668,7 @@ sg_rq_end_io_usercontext(struct work_struct *work)
 		WARN_ONCE(1, "%s: sfp unexpectedly NULL\n", __func__);
 		return;
 	}
-	SG_LOG(3, sfp, "%s: srp=0x%p\n", __func__, srp);
+	SG_LOG(3, sfp, "%s: srp=0x%pK\n", __func__, srp);
 	sg_finish_scsi_blk_rq(srp);
 	sg_deact_request(sfp, srp);
 	kref_put(&sfp->f_ref, sg_remove_sfp);
@@ -1836,7 +1837,7 @@ sg_add_device_helper(struct scsi_device *scsidp)
 	k = error;
 
 	SCSI_LOG_TIMEOUT(3, sdev_printk(KERN_INFO, scsidp,
-			"%s: dev=%d, sdp=0x%p ++\n", __func__, k, sdp));
+			"%s: dev=%d, sdp=0x%pK ++\n", __func__, k, sdp));
 	sprintf(sdp->name, "sg%d", k);
 	sdp->device = scsidp;
 	mutex_init(&sdp->open_rel_lock);
@@ -1935,7 +1936,7 @@ sg_device_destroy(struct kref *kref)
 	struct sg_device *sdp = container_of(kref, struct sg_device, d_ref);
 	unsigned long flags;
 
-	SCSI_LOG_TIMEOUT(1, pr_info("[tid=%d] %s: sdp idx=%d, sdp=0x%p --\n",
+	SCSI_LOG_TIMEOUT(1, pr_info("[tid=%d] %s: sdp idx=%d, sdp=0x%pK --\n",
 				    (current ? current->pid : -1), __func__,
 				    sdp->index, sdp));
 	/*
@@ -1966,7 +1967,7 @@ sg_remove_device(struct device *cl_dev, struct class_interface *cl_intf)
 		return; /* only want to do following once per device */
 
 	SCSI_LOG_TIMEOUT(3, sdev_printk(KERN_INFO, sdp->device,
-					"%s: 0x%p\n", __func__, sdp));
+					"%s: 0x%pK\n", __func__, sdp));
 
 	read_lock_irqsave(&sdp->sfd_lock, iflags);
 	list_for_each_entry(sfp, &sdp->sfds, sfd_entry) {
@@ -2202,7 +2203,7 @@ sg_finish_scsi_blk_rq(struct sg_request *srp)
 	struct sg_fd *sfp = srp->parentfp;
 	struct sg_scatter_hold *req_schp = &srp->data;
 
-	SG_LOG(4, sfp, "%s: srp=0x%p%s\n", __func__, srp,
+	SG_LOG(4, sfp, "%s: srp=0x%pK%s\n", __func__, srp,
 	       (srp->res_used) ? " rsv" : "");
 	if (!srp->sg_io_owned) {
 		atomic_dec(&sfp->submitted);
@@ -2244,7 +2245,7 @@ sg_mk_sgat(struct sg_scatter_hold *schp, struct sg_fd *sfp, int minlen)
 	align_sz = ALIGN(minlen, SG_DEF_SECTOR_SZ);
 
 	schp->pages = kcalloc(mx_sgat_elems, ptr_sz, mask_kz);
-	SG_LOG(4, sfp, "%s: minlen=%d, align_sz=%d [sz=%zu, 0x%p ++]\n",
+	SG_LOG(4, sfp, "%s: minlen=%d, align_sz=%d [sz=%zu, 0x%pK ++]\n",
 	       __func__, minlen, align_sz, mx_sgat_elems * ptr_sz,
 	       schp->pages);
 	if (unlikely(!schp->pages))
@@ -2259,7 +2260,7 @@ sg_mk_sgat(struct sg_scatter_hold *schp, struct sg_fd *sfp, int minlen)
 		schp->pages[k] = alloc_pages(mask_ap, order);
 		if (!schp->pages[k])
 			goto err_out;
-		SG_LOG(5, sfp, "%s: k=%d, order=%d [0x%p ++]\n", __func__, k,
+		SG_LOG(5, sfp, "%s: k=%d, order=%d [0x%pK ++]\n", __func__, k,
 		       order, schp->pages[k]);
 	}
 	schp->page_order = order;
@@ -2295,12 +2296,12 @@ sg_remove_sgat_helper(struct sg_fd *sfp, struct sg_scatter_hold *schp)
 		return;
 	for (k = 0; k < schp->num_sgat; ++k) {
 		p = schp->pages[k];
-		SG_LOG(5, sfp, "%s: pg[%d]=0x%p --\n", __func__, k, p);
+		SG_LOG(5, sfp, "%s: pg[%d]=0x%pK --\n", __func__, k, p);
 		if (unlikely(!p))
 			continue;
 		__free_pages(p, schp->page_order);
 	}
-	SG_LOG(5, sfp, "%s: pg_order=%u, free pgs=0x%p --\n", __func__,
+	SG_LOG(5, sfp, "%s: pg_order=%u, free pgs=0x%pK --\n", __func__,
 	       schp->page_order, schp->pages);
 	kfree(schp->pages);
 }
@@ -2557,7 +2558,7 @@ sg_add_sfp(struct sg_device *sdp)
 	}
 	list_add_tail(&sfp->sfd_entry, &sdp->sfds);
 	write_unlock_irqrestore(&sdp->sfd_lock, iflags);
-	SG_LOG(3, sfp, "%s: sfp=0x%p\n", __func__, sfp);
+	SG_LOG(3, sfp, "%s: sfp=0x%pK\n", __func__, sfp);
 	if (unlikely(sg_big_buff != def_reserved_size))
 		sg_big_buff = def_reserved_size;
 
@@ -2567,7 +2568,7 @@ sg_add_sfp(struct sg_device *sdp)
 
 	kref_get(&sdp->d_ref);
 	__module_get(THIS_MODULE);
-	SG_LOG(3, sfp, "%s: success, sfp=0x%p ++\n", __func__, sfp);
+	SG_LOG(3, sfp, "%s: success, sfp=0x%pK ++\n", __func__, sfp);
 	return sfp;
 }
 
@@ -2610,7 +2611,7 @@ sg_remove_sfp_usercontext(struct work_struct *work)
 		sg_remove_sgat(sfp, &sfp->reserve);
 	}
 
-	SG_LOG(6, sfp, "%s: sfp=0x%p\n", __func__, sfp);
+	SG_LOG(6, sfp, "%s: sfp=0x%pK\n", __func__, sfp);
 	kfree(sfp);
 
 	scsi_device_put(sdp->device);
-- 
2.37.3